Fao Jefftt

[mantav8]

Hi mate,wondered if you can shed some light on this?

After fitting engine oil cooler i noticed on one of the rubber hoses a "bulge",

anyway found this to be what looks like a restrictor in the pipe,is this for pressure drop etc or not?-and is it important?

cheers. ;)

[Guest Jeff TT]

Hi,

 

Yes the restricter is there for a good reason, and not for pressure drop etc, it is to just slow the oil flow down so it is cooled more effeciently before it returns to the engine.

 

The supply to the cooler is secondry to the engine oil pressure anyway so restricting the flow will not cause any oil pressure problems within the engine as it has free flow elsewhere in the galleries.

 

Jeff TT

[mantav8]

Thanks for that jeff,cleared that up nicely! :D

[TopLess]

Hi,

 

Yes the restricter is there for a good reason, and not for pressure drop etc, it is to just slow the oil flow down so it is cooled more effeciently before it returns to the engine.

 

The supply to the cooler is secondry to the engine oil pressure anyway so restricting the flow will not cause any oil pressure problems within the engine as it has free flow elsewhere in the galleries.

 

Jeff TT

 

I am not so sure Jeff.

 

I thought the restrictor was in there to stop you losing pressure and too much oil being diverted to the sump via the cooler, I agree it will not cause higher pressure in the engine, but removal of it could cause low pressure in the engine.

[WillieO]

nah, Jeff's right Mark. The cooler only gets oil if the pressure exceeds a given value after the pump so at low engine speeds nothing goes to the cooler. So whether its restricted, blocked or totally open it does not affect running engine oil pressure at low engine speed.

 

Even at high engine speeds the worst that could happen is the pressure drop via the cooler could in theory drop the engine gallery pressure below the point where the excess oil pressure is diverted to the cooler, somewhere around 50psi. Result no oil to cooler and all available pressure in the galleries. At high engine speeds anyway the relief valve would otherwise be dumping excess pressure oil back to the sump.

[TopLess]

nah, Jeff's right Mark. The cooler only gets oil if the pressure exceeds a given value after the pump so at low engine speeds nothing goes to the cooler. So whether its restricted, blocked or totally open it does not affect running engine oil pressure at low engine speed

 

 

Completely agree with you there!

 

Even at high engine speeds the worst that could happen is the pressure drop via the cooler could in theory drop the engine gallery pressure below the point where the excess oil pressure is diverted to the cooler, somewhere around 50psi. Result no oil to cooler and all available pressure in the galleries. At high engine speeds anyway the relief valve would otherwise be dumping excess pressure oil back to the sump.

Yesterday 22:47

 

 

But here I would rather have the the oil pump giving pressure at the right spec, particularly when the engine is at high revs, too many engine components depend on this.